CN212563635U

CN212563635U - Radial connection structure of gear pump

Info

Publication number: CN212563635U
Application number: CN202021058625.0U
Authority: CN
Inventors: 李平; 曹友国; 胡广
Original assignee: LOTUSFAIRY POWER TECHNOLOGIES CORP
Current assignee: LOTUSFAIRY POWER TECHNOLOGIES CORP
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2021-02-19
Anticipated expiration: 2030-06-10

Abstract

The utility model discloses a radial connection structure of gear pump, include: the gear pump comprises a pump body, a driving gear and a driven gear which are arranged in the pump body, and an oil pressing port, an oil suction port and two inner concave holes which are arranged on the outer wall of the pump body, wherein the two inner concave holes are arranged on two sides of the driven gear and are respectively communicated with the oil pressing port and the oil suction port, and any one of the inner concave holes is arranged along the radial direction of the driven gear; the runner piece, its setting is in the outside of gear pump and with two interior concave orifices intercommunications, include: the shell is matched and connected with the outer wall of the pump body; the flow channel is arranged in the shell, two ends of the flow channel extend out of the shell and respectively extend into the two inner concave holes, and an annular cavity is formed between the outer wall of the end part of the flow channel and the inner walls of the inner concave holes; and the two sealing rings are respectively arranged in the annular cavity and can seal the cavity. The utility model discloses a radially setting up the runner tie point along the gear, carrying out radial seal to gear pump and runner junction, effectively improved the sealing reliability.

Description

Radial connection structure of gear pump

Technical Field

The utility model relates to a gear pump seal structure design field. More specifically, the utility model relates to a radial connection structure of gear pump.

Background

The gear pump realizes the suction and the discharge of fluid through the intermeshing rotation of two gears in airtight space, and the gear pump work that causes because of fluid loss is unusual, unable work scheduling problem easily appears in the in-process of fluid circulation, consequently, the sealing connection of gear pump and runner department is vital.

At present, in the structural design of a gear pump and an application system thereof, an axial sealing connection mode is mostly adopted for the connection of the gear pump and a flow channel, the sealing connection mode has higher requirements on the smoothness and the flatness of a mounting surface when being mounted, and the vibration generated by the operation of a motor in the operation process of the system has larger influence on an axial sealing structure, so that the sealing failure and the fluid leakage are easily caused; based on the above problems, it is necessary to optimize the structure of the gear pump and the connection portion thereof, to reduce the requirements for the sealing connection installation surface and to improve the sealing effect and the system stability.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a radial connection structure of gear pump through the radial runner tie point that sets up along the gear, carries out radial seal to gear pump and runner junction, has effectively improved the sealing reliability.

To achieve these objects and other advantages in accordance with the purpose of the invention, a radial connection structure of a gear pump is provided, including:

the gear pump comprises a pump body, a driving gear and a driven gear which are arranged in the pump body, and a oil pressing port, an oil suction port and two inner concave holes which are arranged on the outer wall of the pump body, wherein the two inner concave holes are arranged on two sides of the driven gear and are respectively communicated with the oil pressing port and the oil suction port, and any one of the inner concave holes is arranged along the radial direction of the driven gear;

the runner piece, its setting is in the outside of gear pump and with two interior concave hole intercommunications include: the shell is matched and connected with the outer wall of the pump body; the flow channel is arranged in the shell, two ends of the flow channel extend out of the shell and respectively extend into the two concave holes, and an annular cavity is formed between the outer wall of the end part of the flow channel and the inner walls of the concave holes;

and the two sealing rings are respectively arranged in the annular cavity and can seal the cavity.

Preferably, the radial connecting structure of the gear pump further comprises two bushings which are respectively arranged at the outer sides of the sealing rings in the cavity, any one of the bushings is arranged along the circumferential direction of the cavity and connected with the side wall of the inner concave hole, and the inner wall of each bushing is in contact with the sealing ring.

Preferably, in the radial connection structure of the gear pump, the bushing is a graphene bushing or a silicon rubber bushing.

Preferably, the radial connecting structure of the gear pump further comprises two support frames which are respectively arranged below the sealing ring in the cavity, any one support frame is of an annular structure and is arranged along the circumferential direction of the cavity, one end of each support frame is connected with the inner wall of the corresponding inner concave hole, and the other end of each support frame is suspended and does not contact with the outer wall of the end part of the flow channel; and the springs are arranged along the circumferential direction of the support frame at intervals, and any spring is arranged between the support frame and the sealing ring and is connected with the support frame.

Preferably, in the radial connection structure of the gear pump, the free length of any spring is greater than the distance between the support frame and the sealing ring.

Preferably, in the radial connection structure of the gear pump, the oil pressure port and the oil suction port are arranged on the surface of the pump body, and the two inner concave holes are arranged on the bottom surface of the pump body and are opposite to the oil pressure port and the oil suction port.

The utility model discloses at least, include following beneficial effect:

1. the radial sealing connection mode is adopted, and the sealing plane of the sealing ring is perpendicular to the rotation plane of the gear, so that the sealing is more stable and reliable, and the risk of sealing failure is reduced;

2. by arranging the bushing on the outer side of the sealing ring, heat at the sealing ring can be more quickly conducted to the pump body of the gear pump on the outer side for heat dissipation, and the sealing failure problems of oxidation, damage and the like of the sealing ring caused by the long-term high-temperature state of the sealing ring are avoided;

3. through the integrated configuration who sets up spring and support frame in the sealing washer below, play the effect of damping when carrying on spacingly to the sealing washer, can prevent that the vibration that produces in the gear pump working process from leading to the sealed dislocation inefficacy problem of the skew axle center of sealing washer to alleviate the pressure of sealing washer one side through elastic support structure under the condition of guaranteeing the compression ratio, prevent that the compression from excessively leading to the sealing washer damaged, life weak point scheduling problem.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic front view of a radial connection structure of a gear pump according to an embodiment of the present invention;

FIG. 2 is a side view schematically showing a radial coupling structure of the gear pump according to the above embodiment;

FIG. 3 is a schematic plan view showing a radial coupling structure of the gear pump according to the above embodiment;

fig. 4 is a front view of the connection structure of the gear pump and the runner block in the above embodiment;

fig. 5 is a top view of the connection structure of the gear pump and the runner block in the above embodiment;

fig. 6 is an assembly structure view of the radial connection structure of the gear pump in the above embodiment.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

As shown in fig. 1-6, the utility model provides a radial connection structure of gear pump, include:

the gear pump 1 comprises a pump body 11, a driving gear and a driven gear which are arranged in the pump body, and an oil pressing opening, an oil suction opening and two inner concave holes 12 which are arranged on the outer wall of the pump body, wherein the two inner concave holes 12 are arranged on two sides of the driven gear and are respectively communicated with the oil pressing opening and the oil suction opening, and any one inner concave hole 12 is arranged along the radial direction of the driven gear;

a flow path block 2 which is provided outside the gear pump 1 and communicates with the two inner concave holes 12, and includes: a housing 21, which is connected to the outer wall of the pump body 11 in a fitting manner; the flow channel 22 is arranged inside the shell 21, two ends of the flow channel 22 extend out of the shell 21 and respectively extend into the two concave holes 12, and an annular cavity is formed between the outer wall of the end part of the flow channel 22 and the inner walls of the concave holes 12;

and the two sealing rings 3 are respectively arranged in the annular cavity and can seal the cavity.

In the above technical scheme, the driving gear and the impulse gear are arranged in the pump body 11 in an up-down symmetrical manner, and a pressure oil chamber and an oil suction chamber are formed on the left side and the right side of the pump body respectively, and the pressure oil port and the oil suction port are arranged at the bottoms of the pressure oil chamber and the oil suction chamber respectively and are communicated with two ends of the flow passage. Fluid pipelines are buried in the flow channel 22 and comprise an oil inlet pipe 24 and an oil outlet pipe 23 which are arranged at two ends of the flow channel and a middle pipe which is communicated with the oil inlet pipe and the oil outlet pipe, and the flow channel 22 is communicated with the oil pressing port in a matched mode through the oil inlet pipe 24 and is communicated with the oil suction port in a matched mode through the oil outlet pipe 23. The diameter of the inner concave hole 12 is larger than the diameters of the oil suction opening and the oil pressing opening.

The fluid is circulated in the following manner: the fluid in the oil pressing cavity is extruded under the continuous meshing of the driving gear and the driven gear, is discharged into the oil inlet pipe through the oil pressing port, enters the oil outlet pipe through the middle pipe, enters the oil suction cavity through the oil suction port, is pressed into the oil pressing cavity under the meshing action of the gears in the oil suction cavity, and is circulated repeatedly.

The oil inlet pipe and the oil outlet pipe of the utility model are arranged along the radial direction of the gear and are vertical to the rotating direction of the motor shaft, so that the influence of the vibration generated by the motor operation on the sealing ring can be effectively reduced, and the sealing structure is more stable and reliable; in addition, the two ends of the flow channel extend into the concave holes in the pump body of the gear pump to be connected in a sealing mode, the sealing contact surface is converted into the side wall of the end portion of the flow channel and the side wall of the concave hole, machining is easy, and the risk of sealing failure is further reduced.

In another technical solution, the radial connection structure of the gear pump further includes two bushings 4, which are respectively disposed at the outer sides of the sealing rings 3 in the cavity, any one of the bushings 4 is disposed along the circumferential direction of the cavity and connected to the side wall of the inner concave hole 12, and the inner wall of the bushing 4 is in contact with the sealing rings 3. The bush is arranged on the outer side of the sealing ring, so that the sealing ring is not directly contacted with the side wall of the inner concave hole 12 in the pump body 11 in work, the sealing effect is ensured, the friction force between the sealing ring and the outer side sealing surface is reduced, the abrasion of the sealing ring in the use process is reduced, and the service life of the sealing ring is prolonged.

In another technical scheme, in the radial connection structure of the gear pump, the bushing 4 is a graphene bushing or a silicon rubber bushing, wherein both the graphene and the silicon rubber are heat conducting materials with good performance, and the gear pump is stable in structure and resistant to high temperature. After the gear pump works for a long time, the fluid temperature is higher, and the high-temperature space can be formed around the sealing ring when flowing through the sealing structure, and at the moment, the graphene or silicon rubber is adopted as a lining to be tightly attached to the periphery of the sealing ring, so that the heat on the sealing ring can be effectively conducted to the outside pump body for heat dissipation and cooling, and the problem that the sealing ring is in a high-temperature state for a long time to cause sealing failure is avoided.

In another technical scheme, the radial connection structure of the gear pump further comprises two support frames 5 which are respectively arranged below the seal ring 3 in the cavity, any one support frame is of an annular structure and is arranged along the circumferential direction of the cavity, one end of each support frame is connected with the inner wall of the inner concave hole 12, and the other end of each support frame is suspended and does not contact with the outer wall of the end part of the flow channel 22; and the springs 6 are arranged along the circumferential direction of the support frame 5 at intervals, and any one of the springs 6 is arranged between the support frame 5 and the sealing ring 3 and is connected with the support frame 5. Among the above-mentioned technical scheme, support frame 5 is the ring piece, and its level is fixed on the lateral wall of interior concave hole 21, and the width of ring piece is less than the interval of the inner wall of interior concave hole 12 and runner 22 outer wall, and the top at support frame 5 is fixed to the one end of spring 6, and free length after the installation of a plurality of springs 6 is all the same, and sealing washer 3 places the other end at a plurality of springs 6. Therefore, the sealing ring is limited in the radial direction through the supporting frame and the spring, and the coaxiality of the sealing ring and the oil inlet pipe 24 and the oil outlet pipe 23 is further ensured; meanwhile, when the gear pump has radial vibration, the reverse acting force of the spring is used for damping the sealing ring, and the stability of the sealing structure is further improved.

In another technical scheme, in the radial connecting structure of the gear pump, the free length of any spring 6 is greater than the distance between the support frame 5 and the sealing ring 3, so that after the flow passage block 2 and the gear pump 1 are assembled, the sealing ring is in a compression state, the cavity can be effectively sealed, and fluid is prevented from leaking from a circulating pipeline. In addition, the inner diameter of the sealing ring in the free state is smaller than the outer diameter of the port of the flow passage 22, so that the sealing ring and the port of the flow passage are in an interference fit state after assembly, and the sealing effect is further improved.

In another technical scheme, the radial connection structure of gear pump, press the hydraulic fluid port with the oil absorption mouth is located the surface of the pump body 11, two interior recesses 12 are located the bottom surface of the pump body 11, and with press the hydraulic fluid port with the oil absorption mouth sets up relatively, make among the sealing connection structure, press hydraulic fluid port, interior recess, oil inlet pipe, the coaxial setting of sealing washer, oil absorption mouth, another interior recess, go out oil pipe, another sealing washer, under the condition of guaranteeing sealed effect, make fluid circulation more smooth and easy through simple structure's fluid pipeline design, reduce the resistance influence of pipeline design to fluid circulation, improve gear pump's work efficiency.

While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.

Claims

1. A radial connecting structure of a gear pump, comprising:

2. The radial connecting structure of the gear pump according to claim 1, further comprising two bushings respectively provided outside the seal ring in the cavity, either bushing being provided along a circumferential direction of the cavity and being connected to a side wall of the inner recess thereof, an inner wall of the bushing being in contact with the seal ring.

3. The radial connection structure of a gear pump according to claim 2, wherein the bushing is a graphene bushing or a silicon rubber bushing.

4. The radial connecting structure of the gear pump according to claim 1, further comprising two supporting frames, each of which is disposed below the seal ring in the cavity, wherein each supporting frame is of an annular structure and is disposed along the circumferential direction of the cavity, one end of each supporting frame is connected to the inner wall of the inner concave hole, and the other end of each supporting frame is suspended and does not contact with the outer wall of the end portion of the flow channel; and the springs are arranged along the circumferential direction of the support frame at intervals, and any spring is arranged between the support frame and the sealing ring and is connected with the support frame.

5. The gear pump radial connection of claim 4, wherein the free length of either spring is greater than the spacing between the support bracket and the seal ring.

6. The radial connecting structure of the gear pump according to claim 1, wherein the oil pressure port and the oil suction port are provided on a surface of the pump body, and the two concave holes are provided on a bottom surface of the pump body and are opposite to the oil pressure port and the oil suction port.